Working on my Panzer 38(t) with interior

My next project is another one I started some time ago but never got around to finishing. It's a DML Pz. Kpfw. 38(t) Ausf. G w/Interior smart kit. I chose this kit to learn how to make a realistic interior, and I have to say, it proved to be quite a challenge. Fortunately I have some awesome products available to me that made my life alot easier working on this project.

Here's a picture of the engine and what I was able to do in just 15 minutes of rubbing with a q-tip some cloth and my fingers to achieve a realistic metal looking miniature engine:

I started off my painting some parts black, some lighter grey and some even lighter grey. I noticed that the black parts gave a darker, more steel like appearance while the lighter grey ones gave a more shiney metal finish. I only used a very little amount of powder from the container, meaning that these three will last me a life time.